title: Facile synthesis of a new fluorogenic metal scavenging interpolymeric diamide based on cellulose and alginic acids.
abstract: A microwave assisted synthesis of a water soluble fluorogenic interpolymeric diamide has been described involving alginic acid and polyglucuronic acid (PGA) amide of ethylenediamine (EDA), through a monoamide of PGA and EDA, in good yields (>80wt% in each step). PGA was prepared by TEMPO (2,2,6,6-tetramethyl piperidine-1-oxyl radical) mediated oxidation of cellulose of the halophytic plant Salicornia brachiata. The amides were characterized by spectral analyses. The fluorescence emission of the PGA amide was 7-fold greater than that of the interpolymeric diamide. PGA monoamide exhibited superior heavy metal ions [Pb(II) and Hg(II)] uptake properties to the diamide, the former showing optimum adsorptions of ions 398.8 and 282.8mg/g, respectively. These materials may be of utility as potential sensors harnessing their fluorogenic and metal scavenging properties.
authors.affiliation: Marine Biotechnology and Ecology Discipline, CSIR-Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India.
authors.forename: Naresh D
authors.initials: ND
authors.lastname: Sanandiya
authors.forename: A K
authors.initials: AK
authors.lastname: Siddhanta
mesh_terms: D000464:Alginates / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D003958:Diamide / Q000031:analogs & derivatives / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D007854:Lead / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*; D008872:Microwaves; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D012995:Solubility
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D009942:Organometallic Compounds; D003958:Diamide; D007854:Lead; D020723:Glucuronic Acid; D002482:Cellulose; D008628:Mercury
keywords: Alginic acid; Cellulose; Diamide; Interpolymer; Metal adsorption; Polyglucuronic acid